Experimental study of the energy transfer efficiency and rock fragmentation characteristics in percussive drilling
Geothermics（2022）
Abstract
•Experimental equipment and numerical calculation platform based on percussive drilling system were built.•The propagation process of impact stress waves was numerically analyzed.•Energy transfer efficiency and rock fragmentation characteristics in percussive drilling were experimentally studied.•Effects of teeth shape, impact parameters and rock temperature on percussive drilling were analyzed.
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Key words
Impact stress wave,Energy transfer efficiency,Rock fragmentation characteristics,High temperature,Rock-breaking specific energy
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